I have draw a random sample of 20 of my neighbors. I ask themtheir income (What can I say? I'm a nosy neighbor). My sampleaverage (x bar) is $41,000. I want to create a 95% confidenceinterval around x bar.
My estimated standard deviation is $5,000.
What is the 95% confidence internal for the average income in myneighborhood? $38,652 to $43.347, $38,663 to $43,336, $38,809 to$43,191, or not enough information?
